Answer:
D) keyboard
Step-by-step explanation:
A printer is an output device that produces hard copies of documents or images. A monitor is an output device that displays information on a screen. A modem is a device that enables communication between devices over a network or the internet, but it is not considered an output device.
A keyboard, on the other hand, is an input device that allows users to input data into a computer or device. Therefore, it is not an output device.